Yeh, it's definitely part of getting older (I can accept that) as well as resuming activity after several years of inactivity+sedentary job.

I'm not really complaining about the pain itself. My main concern is whether the pain is a sign that I need to rest instead of continuing with activity, yet my hips feel worse with inactivity, even a half hour just sitting. Since I don't know if continued activity will make them even worse, or better, I'm not sure what to do and I don't want to further any damage if inactivity is the answer. I suppose one way to find out is to stop all activity for an entire week, take an Advil once or twice (in case there is any inflammation), and see if they feel any better.
The only thing I currently don't do is take supplements. In addition to a good multi-vitamin and cal/mag, I am planning to try glucosamine+condroitin as well. I've read so many good testimonies about it and I'm willing to give it a try.